第二篇：Genetic Engineering(遗传工程)

Genetic engineering began when the DNA molecule…

36.This passage is mainly about

A. the human growth hormone

B. insulin resistance

C. the effects of altering cells

D. U.S Supreme Court rulings

37.Genetic engineering amy be defined as

A. the altering of normal cell reproduction

B. a branch of applied chemistry

C. a procedure that holds little promise

D. a study on life---saving enzymes

38 According to the passage human interferon

A. is a hormone that causes disease

B. could be used to treat cancer

C. is a viral disease

D. has been cured